Any amendment of the contract shall come to force only after the written agreement is signed by both of us.

合同的任何修改都应该经过我们双方书面同意以后方可生效。

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The amendment of the contract or other appendices shall come into force only after the written agreement signed by Party A and Party B and approved by the original examination and approval authority.

对本合同及其附件的修改必须经甲、乙双方签署书面协议，并报原审批机构批准，方可生效。

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The amendment is an appendage of that contract.

这个修改是那个合同的附件。

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